Material Resources Research Articles

Перспективы применения принтованных временных ортопедических конструкций при длительной эксплуатации

The non-removable temporary structures are used in orthopedic dentistry to provide high-quality treatment. The approaches in prosthetics are conditionally divided into conventional and digital. These approaches imply the use of both common materials for prosthetics and unique options. When the conventional approach is used, the quality of orthopedic dental treatment depends on the manual skill of the provider (dental technician). Unlike the conventional approach, the digital one uses a wide range of libraries with ready-made templates for various options for the dentoalveolar system aesthetic and functional characteristics. This fact allows the attending physician to do without any intermediary for the manufacture of dental prostheses, if the material and technical resources permit. The use of 3D printing in dentistry has only recently begun. From our point of view, the active use of photopolymer 3D resins can become a promising option in terms of economic and strength characteristics.

Recovery of Copper Layer from Waste Mobile Phone Printed Circuit Board Without Crushing

Resource recovery and material reuse from waste is an art of circular economy. Waste mobile phone printed circuit boards contain a significant amount of nonferrous and precious metals, where copper is one of the dominant nonferrous elements. This paper presents the recovery of copper material using an electrochemical process from three samples of waste mobile phone printed circuit boards, each double-sided, where for sample preparation no crushing and dismantling are applied except that the painting mask is chemically removed. From mass analysis, the gross amount of the recovered copper from the sample materials was 5.94 g and the calculated average was 1.98 g per sample material. In this way, the copper layer from waste mobile phone printed circuit boards could be recovered economically at an early stage, which could reduce complexity and improve further material recovery compared to the traditional crushing practice.

Unfinished nursing care occurrence, priority order and reasons as perceived by nursing students: An international study.

The study aimed to measure and compare differences (a) in the unfinished nursing care interventions overall and the order in which they are left unfinished; and (b) in the underline reasons, as perceived by Italian, Slovak and Turkish nursing students. In recent years, in the nursing education context a novel line of research in the field of unfinished nursing care as those interventions required by patients, but omitted or delayed, has emerged. However, no studies have been conducted at the international level. An international, comparative cross-sectional study was performed in 2022-2023 and reported here according to Strengthening the Reporting of Observational Studies in Epidemiology guidelines. A multinational research network was formed with a convenient sample of 13 universities and 60 campuses (4595 students). The Unfinished Nursing Care Survey for Students (UNCS4S) was administered. A total of 1850 students participated. According to the UNCS4S total score, Italians reported an average 50.9 out of 110 unfinished nursing care interventions (CI95 % 47.6-54.1), Slovakians 54.9 (CI95 % 53.7-56.1) and Turkish students 50.4 (CI95 % 49.2-51.5) (p<0.001). Some interventions were reported more often as unfinished across countries as supervising the task assigned to the nursing aides, going to the patient without being called, spending the required time with the patient and their caregivers and emotionally supporting patients and their caregivers. In terms of reasons, total scores were statistically different across countries (Italy: 45.92 out of 90, CI95 % 43.91-47.9; Slovakia: 62, CI95 % 61.02-62.98; Türkiye: 72.29, CI95 % 71.13-73.45; p<0.001); however, at the factor level, communication issues, lack of material resources and issues in supervision of nursing aides were reported in all countries as the most important reasons of the unfinished nursing care. Students learn to shape and set priorities early in their nursing careers with similar order in what to leave unfinished as first, despite the different educational structures, care cultures and healthcare systems. Among the unfinished nursing care reasons perceived, the most influential were similar across countries, suggesting common areas for improvement. How to better prepare students to be resilient and capable of managing the challenges posed by unfinished nursing care episodes due to the lack of resources and communications issues should be considered as a priority by nurse educators.

Challenges related to the organizational climate of the nursing team in a public hospital - nurses' perception.

The organizational climate is related to the degree of motivation of its employees. This perception is essentially felt, it is neither seen nor touched, but it is real. This study aims to identify difficulties and potentialities related to the organizational climate of the nursing staff at a public hospital in the Federal District. Methodologically, a descriptive and exploratory study was carried out characterized by a qualitative approach. The thematic content analysis led to three interpretative dimensions: environment and working conditions; communication, interpersonal relationship and work flows; motivation to improve the work environment. The results indicate a deficit of human resources, scarcity of material resources, supplies, precarious physical structure, in addition to interpersonal relationship problems, such as the (de)valuation of professional nurses and nursing. The challenges posed to managers go beyond the technical and structural dimension, the technological complexity of equipment without maintenance, as it unfolds through the human dimension, feelings and unmet needs (of appreciation) of nursing, which needs to be cared for, valued, heard and seen in their care process.

Distribution and potential assessment of biomass raw material resources in the Inner Mongolia region

Abstract With the national energy transition and upgrading, the development of clean energy has attracted significant attention. Among these, agricultural biomass energy plays a crucial role in realizing a low-carbon transition. Taking the Inner Mongolia Autonomous Region as a case study, this research assesses and analyzes the potential of biomass availability in agricultural waste by introducing net biomass calculation. It also examines the overall characteristics of the spatial distribution of available biomass resources in the Inner Mongolia Autonomous Region using GIS software. The results indicate that in 2022, the total amount of straw resources in Inner Mongolia will reach 48, 926, 800, 000 tons, with 24, 198, 900, 000 tons of available biomass energy. Additionally, the dry matter content of livestock and poultry waste is estimated at 28, 198, 000, 000 tons, with 14, 233, 200, 200 tons of available biomass energy. Geospatial analysis reveals a decreasing trend in the regional distribution of available biomass resources from the northeast to the southwest. Furthermore, this paper analyzes various biomass utilization methods. It is estimated that biomass resources can reduce carbon emissions by 913.72 tons if used for biomass power generation. Biomass can also be utilized in pyrolysis and gasification processes. Through these conversion technologies, approximately 2562.62 tons of available biomass in the Inner Mongolia region can be converted. In the benefit analysis, the Inner Mongolia region demonstrates a good economic and environmental situation, with an estimated economic benefit and environmental situation, with an estimated economic benefit of about 70-17 million yuan. Overall, agricultural biomass feedstocks in Inner Mongolia hold significant potential for achieving the dual-carbon goals. Relevant departments should intensify their research and development efforts to promote green agriculture and realize sustainable development.

Empirical Analysis of Circular Economy in EU Countries for Environment Protection in Context of Resources Material and Waste Management

Empirical Analysis of Circular Economy in EU Countries for Environment Protection in Context of Resources Material and Waste Management

Lotus leaf and shark skin-inspired micro-, nano-, hierarchical superhydrophobic surfaces for anti-fouling applications

Fouling, the accumulation and adhesion of unwanted contaminants, is a serious issue around the world in many aspects including industrial transport, marine ecological environment, maintenance of infrastructures, etc. which costs hundreds of millions of dollars and lots of manpower and material resources. Multiscale hierarchical surface structures of superhydrophobic surfaces possess various intriguing properties which provides new platforms for fabricating artificial anti-fouling surfaces. In particular, lotus leaf and shark skin with their unique micro-, nano-, hierarchical surfaces structures are highlighted as emerging tools for anti-bacterial, anti-dust, anti-corrosion, anti-icing, drag reduction applications and so on. In this review, we first provide basic information on two famous superhydrophobic states. After that we outlined the biological models and applications of lotus leaf and shark skin respectively. The self-cleaning effect of superhydrophobic lotus leaf due to their multiscale hierarchical surface structures is discussed after which anti-bacterial applications with three kinds of mechanisms and self-cleaning properties are outlined. Biological models of superhydrophobic shark skin are presented followed by their real-life applications in aircrafts and turbine blades. In addition, we discuss the potential drawbacks of recent biomimetic anti-fouling superhydrophobic surfaces like the loss of anti-fouling hydrophobic materials, adaptability to extreme environments, production and use costs and other problems as well as the possibilities of combine superhydrophobic structures and materials with high temperature resistance, oxidation resistance and other characteristics in order to be applied in more industries fields.

Legal problems of state regulation economic activities in a special period

The paper reveals the role and problems of determining the peculiarities of solving legal problems of state regulation of economic activity in a special period as one of the conditions for the development of a modern democratic society. A detailed study of this issue was conducted, aspects of the regulatory and legal environment and the problems of Ukrainian business work in such difficult conditions were considered. The last few years, the most difficult in the history of the state, have shown that there is a need to move from direct administrative assistance to the formation of a favorable economic and social environment for the improvement of mechanisms and tools for stimulating the development of business entities. It is the priority of state regulation and support of entrepreneurship in such conditions that will provide an opportunity not only to preserve business, but also to expand it with a simultaneous increase in the number of jobs, which is one of the foundations of the functioning of the welfare state. Any difficulties in economic activity quite often give rise to new opportunities for growth, the economy is being restructured, new niches are opening that can be used for growth, and in the future, filling the state and local budgets. The historical experience of the states that have gone through the war shows that the economic system and business development is a key area of further reform and modernization, and the main goal of this process is to create favorable conditions for economic activity, to activate the investment potential of the country and to create comfortable conditions for the functioning of the capital involved. One of the fundamental elements of creating a favorable business environment in Ukraine is the deregulation of economic activity, that is, the maximum simplification of business and government cooperation, the formation of a free market, a transparent permit system, and partnership relations with state regulatory and supervisory bodies. An important aspect of state regulation of economic activity in a special period of state development is, first of all, the conscious formation by state structures of appropriate direct and indirect business support tools, in particular, the creation of incentives, the use of material, financial and other resources that are attracted to its subjects. Special attention was paid to the need to develop and implement specialized legal acts that would regulate the protection of business activities in such emergency situations.

EFFECT OF GREEN INVESTMENT, GOVERNMENT POLICY, AND RESOURCE MANAGEMENT ON THE FINANCIAL PERFORMANCE OF START-UPS IN CENTRAL JAWA

Indonesia, has become a hub for such start-ups, aiming for both financial success and environmental consciousness. Green investments, which fund projects with environmental benefits, play a crucial role. These investments range from adopting energy-efficient technologies to implementing sustainable supply chains, leading to long-term cost savings and improved corporate reputation. Government policy is also vital, as supportive policies in Central Java include monetary rewards, tax breaks, and assistance programs that encourage start-ups to adopt sustainable practices. Effective resource management, which optimizes the use of human, financial, and material resources, is crucial for start-ups facing limited resources and intense competition. Efficient resource management can significantly impact a start-up’s operational efficiency and financial outcomes. This study examines how green investments, government policy, and resource management collectively influence the financial success of start-ups in Central Java. Data was collected from 40 start-ups across various industries using a quantitative approach, and multiple regression analysis was performed. The results show that higher financial performance is primarily due to green investments, supportive government policies, and efficient resource management, with a positive interaction between these factors leading to significant gains. The study provides factual proof that effective resource management, sustainable practices, and compliance with government regulations are essential for successful start-up operations. It highlights the complementary effects of these elements, suggesting that a comprehensive corporate strategy enhances financial results. This study offers insights for start-ups to enhance sustainability and performance and provides recommendations for policymakers to create a supportive entrepreneurial environment.

Chemical, mineralogical and geotechnical properties of volcanic ash of Tajogaite (La Palma, Canary Islands, Spain)

Volcanic eruption at La Palma island (Tajogaite, 2021) has produced tons of volcanic ash as natural sediments spread all around the island covering existing crops, roads, embankments, buildings, etc., by that way producing damage to environment. For the rehabilitation and reconstruction of island, and its application to adjacent areas, it is practical and economical to employ these volcanic ashes as construction material being encountered in abundant volume, and by that way could be considered as a resource material instead as a waste material, reducing necessary volume of landfills for its deposition. This paper defines the investigation of chemical, mineralogical and geotechnical properties of these deposited materials for its possible reuse by that way providing solution for its recovery. These young volcanic ashes are studied in its fresh natural state, prior to consolidation and cementation has taken place for its chemical, mineralogical and geotechnical characterization. Volcanic ash of Tajogaite is of a poorly graded sandy nature having difficulties for its compaction, having low improvement of relative density by the application of standard compaction methods. Mineralogy analysis indicates it is rich in silica, iron, calcium and alumina oxide, although being necessary the addition of mineral additives for its alkali-activation. Geotechnical characteristics of different samples vary depending on the sampling site, being resistance parameters determined by direct shear test (friction angle 30° to 34°) and deformational properties defined by one-dimensional consolidation test considered low values as of loose sand materials (deformation modulus range from 20 to 40 MPa).

КАЙРА ИШТЕТҮҮ ИШКАНАЛАРЫНЫН КАРЖЫЛЫК-ЭКОНОМИКАЛЫК ЖАНА МАТЕРИАЛДЫК-ТЕХНИКАЛЫК РЕСУРСТАРЫНЫН КОЛДОНУЛУУСУ

This article provides an overview analysis of the main resources used in increasing the efficiency of processing enterprises, including the effective use of financial, economic and material and technical resources. Advantages of using financial, economic, material and technical resources in increasing the productivity of processing enterprises have been proven on a scientific and theoretical basis. And, in the article, it is aimed to reveal the place of use of financial, economic and material and technical resources in achieving high profitability and best efficiency for various processing enterprises. Comparison, analysis and hypothesis methods are used in the research, scientific and theoretical aspects are presented. As a result, we have shown that in the process of managing financial resources in enterprises, issues about sources of formation and directions of their use are solved. Economic indicators of developed countries include gross domestic product per capita, unemployment rate, human development index, inflation rate and other key aspects of the economy and society.

In Situ Visual Observation of Surface Energy-Controlled Heterogeneous Nucleation of Metal Nanocrystals.

Electrochemical growth of metal nanocrystals is pivotal for material synthesis, processing, and resource recovery. Understanding the heterogeneous interface between electrolyte and electrode is crucial for nanocrystal nucleation, but the influence of this interaction is still poorly understood. This study employs advanced in situ measurements to investigate the heterogeneous nucleation of metals on solid surfaces. By observing the copper nanocrystal electrodeposition, an interphase interaction-induced nucleation mechanism highly dependent on substrate surface energy is uncovered. It shows that a high-energy (HE) electrode tended to form a polycrystalline structure, while a low-energy (LE) electrode induced a monocrystalline structure. Raman and electrochemical characterizations confirmed that HE interface enhances the interphase interaction, reducing the nucleation barrier for the sturdy nanostructures. This leads to a 30.92-52.21% reduction in the crystal layer thickness and a 19.18-31.78% increase in the charge transfer capability, promoting the formation of a uniform and compact film. The structural compactness of the early nucleated crystals enhances the deposit stability for long-duration electrodeposition. This research not only inspires comprehension of physicochemical processes correlated with heterogeneous nucleation, but also paves a new avenue for high-quality synthesis and efficient recovery of metallic nanomaterials.

The Quick Determination of a Fibrous Composite’s Axial Young’s Modulus via the FEM

Knowing the mechanical properties of fiber-reinforced composite materials, which are currently widely used in various industrial branches, represents a major objective for designers. This happens when new materials are used that are not yet in production or for which the manufacturer cannot give values. Given the practical importance of this problem, several methods of determining these properties have been proposed, but most of them are laborious and require a long calculation time. And, some of the proposed calculation methods are very approximate, providing only upper and lower limits for these values. Experimental measurements are obviously the optimal solution for solving this problem, but it must be taken into account that this type of method consumes time and material resources. This paper proposes a sufficiently accurate and fast estimation method for determining Young’s modulus for a homogenized fibrous material. Thus, the FEM is used to determine the natural frequencies of a standard bar, for which there are sufficiently precise classical methods to express the engineering constants according to the mechanical properties of the component phases of the homogenized material. In this paper, Young’s modulus is determined for such a material using the relationships that provide the eigenfrequencies for the longitudinal vibrations. With the adopted model, transverse and torsional vibrations are eliminated by blocking the nodes on the surfaces of the bars. In this way, more longitudinal eigenfrequencies can be obtained, so the precision in calculating Young’s modulus is increased.

ANALYSIS OF THE FUNCTIONALITY OF LOGISTICS MANAGEMENT FOR EFFECTIVE SUPPLY CHAIN MANAGEMENT IN CONSTRUCTION

The article delves into the critical role of logistics management in the construction industry, emphasizing the need for efficient material resource management and optimized supply chains. It aims to explore the principles of logistics management in construction organizations for supply chain management, with a specific focus on minimizing costs and optimizing resource utilization. The proposed strategic approach involves the transformation of classical concepts into logistics-oriented organizational activities, integrating advanced technologies and innovative resource management systems to unlock the full potential of material assets and streamline operations. The article underscores the potential impact of these strategies on the nation's economic landscape, emphasizing their contribution to economic stability and resilience. Additionally, the integration of logistics management into construction practices is highlighted as a catalyst for scientific advancements within the field. Serving as a roadmap for construction companies, the article urges the adoption of forward-thinking strategies aligned with the demands of the contemporary construction landscape. By embracing innovative approaches and leveraging advanced technologies, construction organizations can drive economic revitalization and contribute to broader urban development initiatives. Additionally, the article emphasizes the importance of collaboration and integration among stakeholders in the construction industry, leveraging digital platforms and collaborative tools to enhance communication, share real-time data, and streamline coordination among suppliers, logistics providers, and project teams. Integrated logistics networks will enable seamless flow of information and resources.

Bargains, Handouts, and Hand-Me-Downs: Poor Households’ Use of (Re)distribution Systems

ABSTRACT Consumption practices represent a central mode of social integration. Yet, due to the lack of material resources poor households cannot meet the expectations of dominant consumer culture, thus facing limited choices and feelings of shame. Based on a qualitative long-term study of the welfare production of 40 poor Swiss households, this article sheds light on consumption patterns and experiences in different distribution systems, namely the primary market, the charity system, and redistribution systems for used goods. It shows that feelings of shame and processes of exclusion differ between distribution systems according to institutional features conducive to the (in)visibility of poverty.

Identifying circRNA-disease association based on relational graph attention network and hypergraph attention network

In recent years, with the in-depth study of circRNA, scholars have begun to discover a synergistic relationship between circRNA and microorganisms. Traditional wet lab experiments in biology require expensive financial, material, and human resources to investigate the relationship between circRNA and diseases. Therefore, we propose a new predictive model for inferring the association between circRNA and diseases, called HAGACDA. Specifically, we first aggregate the unique features of circRNA and diseases themselves through singular value decomposition, Pearson similarity, and the biological information characteristics of circRNA and diseases. Utilizing the competitive relationships between miRNA and other microorganisms, we construct a circRNA-miRNA-disease multi-source heterogeneous network. Subsequently, we use a relational graph attention network to aggregate features based on the structural connections between different nodes. To address the inherent limitations in capturing high-order patterns in edge sets, we integrate a hypergraph attention network to extract features of circRNA and diseases. Finally, association prediction scores for node pairs are obtained through a multilayer perceptron. We conducted a comprehensive analysis of the model, including comparative experiments and case studies. Experimental results demonstrate that our model accurately predicts the association between circRNA and diseases.

Being as Having, Loving, and Doing: A Theory of Human Well-Being

Academic Stronger theory on the nature of human well-being is needed, especially as well-being indicators are increasingly utilized in policy contexts. Building on Erik Allardt, who argued that a theory of well-being is, in essence, a theory of human nature, I propose four modes of existence each capturing one dimension central to human well-being: Having recognizes humans as biological creatures requiring certain material resources for survival. Loving captures human social nature and our dependence on others for well-being. Doing highlights the active and agentic nature of human existence. Being acknowledges humans as experiencing their existence. Each mode of existence gives rise to a few more specific needs, and a full assessment of human well-being requires both subjective and objective indicators tapping into these needs. The proposed theory integrates psychological well-being research with sociological and philosophical traditions and contributes to debates about how the progress of nations and sustainability should be measured. Public Well-being is something we all value individually, and it is also a key political goal. Accordingly, how we define and measure well-being influences what physicians, managers, policy-makers, politicians, and international organizations aim to improve through their work. Better theories of well-being make better measurement of well-being possible, which makes possible more effective and evidence-based advancement of human well-being. In this spirit, the present article argues that there are four fundamental dimensions to human well-being: Having highlights that as biological creatures, we have physical needs, loving highlights human social needs, doing highlights that we are active and agentic beings with goals and strivings, and being highlights that we feel and evaluate our lives. To assess well-being, we need measures tapping into all four of these dimensions. And to assess the sustainability of well-being, we need to examine how to provide well-being for all humanity while remaining within planetary boundaries.

ACP-CapsPred: an explainable computational framework for identification and functional prediction of anticancer peptides based on capsule network.

Cancer is a severe illness that significantly threatens human life and health. Anticancer peptides (ACPs) represent a promising therapeutic strategy for combating cancer. In silico methods enable rapid and accurate identification of ACPs without extensive human and material resources. This study proposes a two-stage computational framework called ACP-CapsPred, which can accurately identify ACPs and characterize their functional activities across different cancer types. ACP-CapsPred integrates a protein language model with evolutionary information and physicochemical properties of peptides, constructing a comprehensive profile of peptides. ACP-CapsPred employs a next-generation neural network, specifically capsule networks, to construct predictive models. Experimental results demonstrate that ACP-CapsPred exhibits satisfactory predictive capabilities in both stages, reaching state-of-the-art performance. In the first stage, ACP-CapsPred achieves accuracies of 80.25% and 95.71%, as well as F1-scores of 79.86% and 95.90%, on benchmark datasets Set 1 and Set 2, respectively. In the second stage, tasked with characterizing the functional activities of ACPs across five selected cancer types, ACP-CapsPred attains an average accuracy of 90.75% and an F1-score of 91.38%. Furthermore, ACP-CapsPred demonstrates excellent interpretability, revealing regions and residues associated with anticancer activity. Consequently, ACP-CapsPred presents a promising solution to expedite the development of ACPs and offers a novel perspective for other biological sequence analyses.

BIM-based building performance assessment of green buildings - A case study from China

In China, traditional buildings have begun to exhibit a range of issues, such as elevated levels of energy consumption and pollution. Consequently, these concerns have led to substantial resource inefficiency and environmental degradation. The evaluation and examination of green buildings are of utmost importance in promoting sustainable development. The current green building assessment framework is intricate and lacks sufficient development in terms of visual representation. Developing a green building strategy during the initial design phase is a multifaceted process that necessitates substantial allocation of human, material, financial, and temporal resources. In this study, we propose an assessment framework that incorporates a 15 s-level and 45 three-level green building indicator system, along with a 4-level classification standard. This framework is developed based on the most recent Chinese Assessment Standard for Green Building and the utilization of a Building Information Modeling (BIM) database. Furthermore, the integration of BIM with Pathfinder software is employed to assess the safety aspects of green buildings. On top of that, the combination of BIM with Ecotect software is utilized to evaluate the environmental aspects of green buildings. In this study, we performed a case study on a teaching building located at a university in central China, specifically focusing on the simulation of green building practices. The sequential calculation involves determining the duration of personnel evacuation, assessing the lighting conditions, evaluating the thermal conditions, analyzing the sound conditions, and examining the wind conditions. In addition, efforts were made to optimize the indicators requiring enhancement in order to enhance the efficacy of green buildings.

Social Group Membership, Social Identities, and Mental Health Experiences in Urban Poor Communities in Ghana: A Critical Social Psychology Inquiry.

Social groups and identities significantly influence mental health outcomes, yet their impact in resource-poor communities remains understudied. We explored the role of social group memberships and identities in shaping mental health experiences in two urban poor communities in Ghana. Data from 77 participants were analyzed thematically, revealing widespread engagement in social groups that provide access to both material and symbolic resources. However, these groups also serve as sources of tension and contribute to the stigmatization and marginalization of vulnerable members. Those affected include individuals with severe mental disorders, men experiencing depression, young men involved in substance abuse, family caregivers, migrant and tenant households, and otherwise healthy individuals with recurring psychosocial challenges. The groups exacerbate mental health challenges and restrict access to care among marginalized populations. The findings underscore the need for targeted interventions aimed at enhancing mental health support and reducing stigma in resource-poor settings.